OTHER ANSWERS

Sorry for the trouble on the Magento stock issue. It appears that you can set your product to OUT OF STOCK, even though it is in stock. You would need to set to IN STOCK and then it should appear normally. Check out this article on the Stock Availability setting: Magento Stock Availability.

I hope that helps to answer the question! If you're still having issues and still need assistance please let us know.

I also spoke with a person who actually manages a fairly large Magento installation. He said that if it was not simply that setting, then you may need to go into the Magento interface and clear the cache. Magento can be set to cache its pages for easier loading. If you have not cleared the cache, then it's possible you're seeing the old version from the Magento cache.